Hi there, I wonder if anyone could help me with this one.
I've recently had to replace the head gasket on my fathers 318 due to failure of one of the grotty plastic water pipes, now I seem to be getting some electrical issues after putting it back together Not sure what's gone wrong (or even how, with the ECU disconnected during the job) and would really appreciate any advice anyone can give - it's driving me crazy
It had codes for crank and cam sensor pre-rebuild, so they've been replaced.
Car won't start - timing, compression etc are all spot on, engine turns over on starter but no spark or injection
Seem to be getting voltages of around 6v at the airflow meter and injector power feeds checking them with a multimeter. Doesn't sound quite right, but I don't work on BMWs generally and don't know if that's normal.
Inpa gives error codes for DISA, fuel tank vent, secondary air and AFM. Other than AFM would any of these actually stop the car starting?
Diagnostics are confirming the car's getting 12v into the ECU no issues, voltage on the AFM connector stays around 6 volts even when you go down the motor disconnecting each component to see if any of them is causing a voltage drop (I've run out of things to disconnect from the engine and no improvement as yet). Have I somehow exploded something internal to the ECU, or am I chasing a problem that isn't actually there due to inexperience with this motor?
Many thanks in advance